EP3410914A1 - Haushaltsgeschirrspülmaschine sowie verfahren zum betreiben einer solchen - Google Patents
Haushaltsgeschirrspülmaschine sowie verfahren zum betreiben einer solchenInfo
- Publication number
- EP3410914A1 EP3410914A1 EP17700848.9A EP17700848A EP3410914A1 EP 3410914 A1 EP3410914 A1 EP 3410914A1 EP 17700848 A EP17700848 A EP 17700848A EP 3410914 A1 EP3410914 A1 EP 3410914A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- heat exchanger
- air
- domestic dishwasher
- storage medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/48—Drying arrangements
- A47L15/483—Drying arrangements by using condensers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0047—Energy or water consumption, e.g. by saving energy or water
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/48—Drying arrangements
- A47L15/488—Connections of the tub with the ambient air, e.g. air intake or venting arrangements
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/19—Air humidity
Definitions
- the invention relates to a method for operating a domestic dishwasher as part of a washing program.
- a household dishwasher for cleaning items to be washed is described.
- Domestic dishwashers are known in the art and serve in principle the cleaning or washing and subsequent drying of contaminated items, such as crockery or cutlery.
- a drying system for the cleaned item to be cleaned in which the water absorbs the water which adheres to the cleaned items, so that the item to be washed is dried.
- the now moist air leaves the household dishwasher in some types of drying systems and enters their surroundings, for example in a kitchen. As a rule, this steam-laden air finally flows over the kitchen's upper and / or working surfaces, whereby the water vapor entrained in the air condenses on it and precipitates as moisture.
- This moisture forms a breeding ground for bacteria, molds, or the like, so that it comes at these points to a microbial load, which is extremely undesirable, especially in kitchens, as associated with the health risks.
- moisture can damage the surfaces.
- wood components such as e.g. Worktops made of pressed wood fibers are affected, they can be damaged by the moisture.
- the object of the present invention is to counteract these disadvantages.
- a method for operating a domestic dishwasher as part of a wash program is initially proposed, wherein the wash program includes, inter alia, a partial program step, in particular a cleaning step, while heated or heated wash liquor or dishwashing liquid is applied to the washware arranged in the receiving space of the wash container of the domestic dishwasher.
- the rinsing liquor in the cleaning step is preferably a mixture of heated water and a rinsing or cleaning agent, or in the final rinse step a mixture of heated water and a rinse aid.
- the rinsing liquor may also be unheated, ie cold, fresh water, for example in the pre-rinsing step preceding the cleaning step of the rinsing program, or in an intermediate rinsing step which may be inserted between the cleaning step and the subsequent rinsing step of the rinsing program.
- the rinsing liquor receives dirt particles from the items to be rinsed or washed, so that the dirt particles are removed from the items to be washed.
- a drying step is followed by a washing program, during which fresh air or outside air flows into the receiving space.
- fresh air or outside air flows into the receiving space.
- a rinse step and / or intermediate rinse step are further steps, for.
- the air in the receiving space absorbs moisture from the previously treated with heated rinse wash ware to dry it.
- the moisture on the dishes still has such an elevated temperature that they easily evaporate and can be absorbed by the passing air.
- the household dishwasher now comprises a heat exchanger with a heat storage medium and a heat pump arrangement.
- the heat storage medium with the aid of the heat pump assembly before the drying step heat (ie heat energy), in particular in a partial program step to be heated with rinsing water such as the cleaning step, withdrawn.
- the heat can be withdrawn from the heat storage medium additionally or alternatively also during the drying program-concluding drying step.
- the heat storage medium of the heat exchanger preferably has a high specific heat storage capacity and / or a high enthalpy of fusion (preferably at least 300 kJ / kg).
- the heat storage medium can be, for example, a liquid, in particular water or a liquid comprising water.
- the heat exchanger comprises a storage tank for the heat storage medium, in particular water.
- the storage tank may be formed according to a first expedient variant as a closed container.
- the heat storage medium can thus be present in a separate storage container of the heat exchanger so that it is arranged in a closed system and, for example, no direct contact with the air, that is, process air from the receiving space.
- a means preferably fluid such as salt water or a gas or gas mixture, can be used as a heat storage medium in such a closed storage container, which is unsuitable as a rinsing liquor, ie treatment liquid in the receiving space of the rinsing container for washing the items to be cleaned there is.
- the heat exchanger in a double function as a heat storage tank for removing heat energy from the heat storage medium stored in it, in particular water, through the heat pump assembly and at the same time as a removal tank or filling tank for supplying treatment liquid into the receiving space of the Spül organizations the Sellsgeschirrter. Dishwasher be formed.
- the heat storage medium, in particular storage water, from this heat exchanger is thus used at least partially as a treatment liquid in the receiving space in the respective liquid-conducting partial program step of a washing program.
- the heat exchanger Due to its dual function as a heat exchanger and filling tank space in the dishwasher is advantageously saved, ie it is not necessary to provide space for a separate tank with heat storage medium and space for a separate tank with treatment liquid or process liquid, especially fresh water, within the dishwasher. It can be expedient, in particular, if the heat exchanger is formed by a container in which water, in particular fresh water, as heat storage medium and treatment liquid, via a supply line, in particular from a water supply network, can be filled, and from the outlet side via a discharge water as the treatment liquid or process fluid can be fed into the receiving space of the washing container of the dishwasher.
- the heat exchanger is therefore preferably operated here as an open tank with a water inlet and a water outlet.
- the heat storage medium in the tank or container of the heat exchanger is at least partially or completely changed, ie the container stored there heat storage medium partially or completely removed and filled with fresh heat storage medium, especially fresh water, so the risk of unwanted contamination the container of the heat exchanger largely avoided.
- this change of the heat storage medium can be beneficial for the thawing of any ice that has formed in the storage tank from the heat storage medium during the respective active phase of operation of the heat pump assembly where heat is removed from the heat storage medium. Because the temperature and thus the thermal energy content of the storage tank newly supplied heat storage medium such as fresh water is usually higher than the temperature and the heat energy content of the storage container to ice solidified heat storage medium.
- a drying system of the domestic dishwasher in which process air is transported out of the receiving space, in particular via a connected to an air outlet of the receiving space air duct preferably by means of a blower, and delivered to the environment of the dishwasher during the drying step of the respective washing program, according to an advantageous Continuing a section of this air duct on an outer wall of the filled with the heat storage medium container or storage container, preferably thermally contacting, pass or pass through the container.
- a partial area or the total area of a wall of the storage container forms or replaces a wall section of the air channel, so that the process air exiting from the receiving space on a wall of the storage tank or storage container filled with the heat storage medium directly, ie directly contacting canpetschich.
- the fact that the air duct is thermally coupled to the storage tank at least along part of its course results in effective heat transfer between the heat storage medium of the storage tank and the process air led out of the receiving space in a simple manner.
- the process air and the heat storage medium remain materially separated from each other.
- the heat exchanger is attached on the outside to a wall, in particular side wall, of the washing container of the domestic dishwasher, and in particular a thermal insulation layer or thermal barrier is provided between the heat exchanger and the wall of the washing compartment.
- a thermal insulation layer or thermal barrier is provided between the heat exchanger and the wall of the washing compartment.
- the heat pump assembly further includes a refrigerant in its piping circuit.
- the refrigerant in the line loop of the heat pump assembly and the heat storage medium in the heat exchanger are separated from each other or have no direct contact with each other. However, between the refrigerant and the heat storage medium, a heat flow can form, d. H. Heat can be exchanged between the refrigerant and the heat storage medium.
- the heat pump assembly includes a compressor or compressor for the refrigerant.
- Heat pump assembly entering gaseous refrigerant compresses, where it heats up.
- the heat pump arrangement comprises a condenser, in which the heated gaseous refrigerant condenses again and thereby releases heat which, for example, by means of a thermal transfer means such as a heat exchanger. shear elements can be used for heating the rinsing liquor.
- the liquefied refrigerant is expanded by means of a throttle and finally passes into an evaporator of the heat pump arrangement, in which it passes under heat absorption again in the gaseous state, and then again to the compressor to be supplied to the.
- the heat required for the evaporation of the refrigerant comes from the above-mentioned heat storage medium of the heat exchanger, this is thus withdrawn.
- the cooled after passing through the said throttle refrigerant thus cools as a result, the heat storage medium.
- the refrigerant and the heat storage medium remain advantageously separated from each other. This can be done, for example, by means of a pipeline through which the refrigerant flows, with the refrigerant being conducted through the heat storage medium in the pipeline (the pipeline thus penetrates, for example, a storage volume having the heat storage medium).
- the pipe heat transfer is given in particular from the heat storage medium of the heat exchanger to the refrigerant of the heat pump assembly.
- process air is passed through the heat exchanger.
- the process air is that which originates from the receiving space of the washing container of the domestic dishwasher and has taken up the moisture of the items to be washed there.
- Heat is withdrawn from the heat exchanger via the water vapor entrained in the process air in the area of the heat exchanger. This heat is in turn transmitted to the (previously during the respective part program step heated with rinse liquor) using the heat pump assembly cooled heat storage medium.
- the water vapor in the process air in the region of the heat exchanger condenses at least partially.
- the process air leaving the household dishwasher is deprived of moisture.
- the moisture entrained by the process air is largely prevented from condensing on surfaces or other objects of the premises (eg, a kitchen) surrounding the domestic dishwasher, making them wet or moist, and / or forming a breeding ground for microorganisms.
- the essence of the present invention is therefore to remove heat from a heat storage medium of a heat exchanger of a domestic dishwasher with the aid of a heat pump and to bring the cooled heat storage medium into heat-conducting contact with the moist process air coming from the receiving space of the domestic dishwasher to extract water from the water To condense process air and dry the process air before it leaves the household dishwasher, especially in the environment at their installation.
- the condensed water vapor can be removed from the domestic dishwasher, for example, via a waste water outlet, via which the rinsing liquor is also removed. An introduction into the recording room would be conceivable.
- the water content of the process air flowing out of the domestic dishwasher is reduced by means of the heat exchanger to a maximum of 50 g of water / m 3 of air.
- the water content is reduced to a maximum of 15 g of water / m 3 of air.
- heat can be extracted from the heat storage medium by means of an evaporator of the heat pump arrangement during a partial program step with the wash liquor or wash liquor to be heated, for example the cleaning step, wherein the heat can be transferred to the wash liquor.
- the refrigerant is evaporated, absorbing heat.
- the refrigerant does not have to be evaporated.
- expansion of the refrigerant may be sufficient while it also absorbs heat.
- the heat can be used to heat the rinsing liquor, so that the heat is used meaningfully again.
- incoming outside air flowing into the receiving space of the washing container of the domestic dishwasher can be heated prior to contact with the items to be washed.
- a heated air can absorb more water vapor than a cooler air. This allows the items to be washed faster with the heated air.
- the heating can be done for example by means of an electric heating element, the z. B. in the region of an air inlet of the domestic dishwasher or in a connecting the air inlet and the receiving space of the domestic dishwasher channel is arranged.
- the air flowing into the receiving space from the outside is heated by supplying heat to this air by means of a heat exchanger which becomes free during operation of the heat pump arrangement in the region of the condenser of the heat pump arrangement.
- the refrigerant can condense, in particular it is converted from the gaseous to the liquid state of aggregation, during which it cools down.
- the heat emitted in this case is transferred to the incoming air.
- a heat cycle in the heat pump assembly can be closed and the energy efficiency of the domestic dishwasher can be improved.
- the incoming air can also be heated with a (preferably different from a heat pump), preferably electric, heating element.
- the incoming air is not heated.
- the wash ware is heated in a rinse step preceding the drying step in order to ensure that the moisture adhering to the ware vaporises or evaporates during the drying step and is thereby absorbed by the air (process air) in the receiving space can be.
- the heating of the items to be washed takes place with the aid of previously heated rinse liquor (which may in this case comprise a rinse aid).
- the air (process air) is moved by means of a fan from the receiving space into and / or through the heat exchanger and finally out of the domestic dishwasher.
- the heat pump arrangement preferably comprises the above-mentioned compressor, wherein the speed of the fan and / or the power of the compressor can be adjusted depending on the humidity of the air leaving the heat exchanger.
- the household dishwasher thus preferably comprises a sensor in the region of the heat exchanger, in the region between the heat exchanger and an air outlet, in particular the washing container, the domestic dishwasher (can escape through the air from the domestic dishwashing machine), or in the region of said air outlet.
- the sensor is preferably designed to detect the air humidity or the dew point temperature of the air.
- the speed of the fan and / or the power of the compressor are preferably varied as a function of the respective detected variable (only one or both variables can be taken into account). It may also be advantageous if a corresponding sensor is also arranged outside the domestic dishwasher and also its measurement signal is used as the basis for changing the speed of the fan and / or the power of the compressor. For example, it would be conceivable to regulate the speed of the fan and / or the power of the compressor such that the dew point temperature or humidity of the air leaving the household dishwasher, i. Process air is always lower than the dew point temperature or the humidity of the domestic dishwasher immediately surrounding air. As a result, condensing of water vapor still contained in the process air leaving the domestic dishwasher to the household dishwasher is largely avoided or effectively prevented.
- the household dishwasher has a heat exchanger with a heat storage medium.
- the heat storage medium is preferably water or a water-containing substance, for example a saline solution.
- the household dishwasher comprises a souppumpenanord- tion, with the help of which heat from the heat storage medium to a circulating during operation of the household dishwasher in the domestic dishwasher washing water is transferable.
- the heat pump assembly includes the above-described components compressor, condenser and throttle.
- the heat pump arrangement comprises an evaporator which is arranged in the region of the heat exchanger such that heat can be transferred from its heat storage medium to the evaporator.
- the evaporator is flowed through by a refrigerant which absorbs the heat released by the heat transfer medium or heat storage medium and thereby evaporates.
- the domestic dishwasher further comprises a receiving space and the heat exchanger connecting air duct and a fan. With the help of the fan, air (process air) can be moved from the receiving space via the air duct into or through the heat exchanger.
- the domestic dishwasher has a downstream of the heat exchanger air outlet. Through the air outlet, the air dehumidified by means of the heat exchanger leaves the heat exchanger and enters the environment, for example in a kitchen.
- the air passed through the receiving space during a drying step (the water content of which is increased when the warm items to be washed pass through) can now be cooled in the area of the heat exchanger.
- the water vapor entrained by the air at least partially condenses, so that the absolute water content of the air is reduced.
- condensation of moisture on surfaces of the premises surrounding the domestic dishwasher is largely avoided. Moisture-related damage to these surfaces or the formation of a nutrient medium for microorganisms are thus reliably prevented.
- the heat exchanger preferably comprises a closed receptacle in which the heat transfer medium or heat storage medium is located.
- said air duct passes through the heat exchanger in such a way that it is at least partially bounded by one or more walls of said receptacle, which in turn is in direct contact with the heat transfer medium.
- the evaporator is at least partially surrounded by the heat storage medium, ie, the evaporator is at least partially disposed within the said receptacle.
- the heat can be transferred from the heat storage medium to the refrigerant flowing through the evaporator by means of a heat flow.
- a contact area between the evaporator and the heat storage medium is at least 50 cm 2 , preferably at least 100 cm 2 , more preferably at least 200 cm 2 , so that as much heat as possible can be transferred per time.
- the heat exchanger has a flow channel for the air passing through the heat exchanger, wherein the flow channel is preferably formed by the above-mentioned walls of the heat transfer medium accommodating receptacle of the heat exchanger.
- At least one heat exchanger element at which the air passing through the heat exchanger flows past when it is moved by means of the fan through the flow channel, extends into the flow channel.
- the surface of the heat exchanger element which comes into contact with the air can have a shape which deviates from a flat surface (in order to enlarge the surface in relation to a flat surface), so that the passing air or the air flowing from the Air entrained water vapor in a relatively short time can deliver a large amount of heat to the heat transfer medium.
- the heat exchanger element comprises a plurality of fins which extend into the flow channel and preferably also into the heat transfer medium.
- the heat exchanger element (of which in principle several may also be present) has one or more heat exchanger elements. sections that extend into the heat storage medium (the heat exchanger sections may be formed for example by the above-mentioned fins). With the heat exchanger sections (s) a thermal bridge is formed between the sections of the heat exchanger element which come into contact with the air flowing through the heat exchanger and the heat storage medium. The heat of the passing water vapor thus flows via the heat exchanger element to the or the heat exchanger sections (s) and from there into the heat storage medium.
- the fan is arranged downstream of the heat exchanger in the flow direction of the air passing through the heat exchanger during operation of the fan.
- the heat pump arrangement comprises a condenser, with the aid of which the refrigerant compressed by the compressor is converted from the gaseous state into its liquid state, whereby heat is generated which can be removed from the condenser.
- the household dishwasher has an air inlet for the entry of air into the domestic dishwasher, in particular into the receiving space of the washing compartment.
- the household dishwasher can have means by means of which the heat released during the condensation of the refrigerant can be transferred from the condenser to the air flowing in via the air inlet into the household dishwasher, in particular into the receiving space of the washing compartment.
- the refrigerant of the heat pump assembly is transferred from the gaseous state to the liquid state, wherein a condensation enthalpy is released. This causes the refrigerant to give off heat so that the air entering through the air inlet can be heated.
- the means for transferring this heat may, for example, be a further heat exchanger or a further heat exchanger element.
- the additional heat exchanger or the additional heat exchanger element may for example comprise a system of tubes and / or fins.
- the capacitor be arranged, or with the other heat exchanger or heat exchanger element, the capacitor may be thermally coupled in any other way, which heats the system of tubes and / or fins. Between the pipes and / or in particular through the fins, the incoming air can flow and thereby absorb the heat. When the air entering the domestic dishwasher from outside is heated, it can absorb more moisture so that the drying effect of the air on the wet items is improved.
- the domestic dishwasher has a control and / or regulating unit which is designed to operate the domestic dishwasher according to a method of the preceding description.
- the control and / or regulating unit is connected to the heat pump assembly and / or the fan.
- the control and / or regulating unit operates all other necessary for the operation components of the household dishwasher.
- FIG. 1 shows a household dishwasher with a receiving space, a
- FIG. 1 shows a domestic dishwasher 1 with a receiving space 2 in its washing container 21, with a heat exchanger 4 and with a heat pump arrangement 6.
- items 3 to be cleaned are arranged, which during a liquid-carrying partial program step or several liquid-carrying partial program steps of a dishwashing program a rinsing liquor or rinsing liquid (not shown) acted upon, in particular by means of one or more, arranged in the rinsing sprayer is sprayed.
- the respective dishwashing program to be carried out has the liquid-carrying partial program steps of pre-rinsing step, cleaning step, intermediate rinsing step, final rinse step and a drying step concluding a dishwashing program, one after the other.
- the pre-rinsing step and / or the intermediate rinsing step can be dispensed with.
- the respective liquid-carrying partial program step such.
- Intermediate rinse step is performed several times.
- Liquid-carrying partial program steps, in which the rinsing liquor is heated to a desired minimum temperature are preferably the cleaning step and the final rinse step.
- the rinsing liquor or rinsing liquid is heated to a certain minimum temperature.
- the rinsing liquor or rinsing liquid is advantageously heated to above 60 ° C. in the cleaning step, so that its cleaning effect is increased. It is formed in the purification step by a predetermined amount of water to which one or more cleaners are added.
- the elevated temperature of the rinsing liquor is also accompanied by an increased air humidity of the air in the receiving space 2.
- the air in the receiving space 2 has substantially the same temperature as the heated rinsing liquor or rinsing liquid.
- water added as rinse liquor with rinse aid is in the receiving space 2 previously heated during the cleaning step on the then already warm or heated items being sprayed by means of one or more spray - kept high the moisture content of the air in the receiving space, in particular so high that a relative humidity of about 100% is present.
- the rinse aid liquor is also heated by means of the heat pump arrangement and / or by means of a separate heating device such as a liquid continuous flow heater and distributed in the receiving space with the wash ware, in particular by means of one or more spray devices.
- fresh air or supply air is directed into the receiving space 2 from the outside during the drying step of the respective dishwasher program of the household dishwasher 1.
- the inflowing fresh air or outside air is symbolized in each of FIGS. 1, 2 by an arrow 22.
- the fresh air takes on the moisture that adheres to the items 3, and thus has a high water content and high humidity.
- the water content is in particular higher than the water content of the ambient air of the household dishwasher 1, which is placed for example in a kitchen.
- the heat exchanger 4 preferably comprises at least one heat exchanger element 14, which, as explained in more detail below, has a temperature which ensures that the water vapor contained in the air at least partially condenses on the heat exchanger element 14.
- the temperature of the heat exchanger element 14 should be lower than the temperature, in particular dew point, of the air-steam mixture fed from the receiving space 2 to the heat exchanger 4 in order to achieve the desired condensation of the water vapor enable.
- the temperature of the heat exchanger element 14 is lower than the temperature of the household dishwasher 1 directly surrounding surfaces, for. As the adjacent to the household dishwasher 1 surfaces of the household dishwasher 1 surrounding kitchen cabinet. This ensures in particular that the amount of water in the air leaving the household dishwasher 1 is reduced in such a way that little or no water condenses on the surfaces mentioned.
- the condensed water in the heat exchanger 4 can be returned to the wash liquor and / or cached for a liquid-conducting part program step of a subsequent dishwashing program, so that the water consumption of the household dishwasher 1 is reduced.
- the heat exchanger element 14 may, for example, have fins or be formed by lamellae, so that the surface of the heat exchanger element 14 coming into contact with the process air or the water vapor entrained by the process air is increased. As a result, a particular amount of water vapor can condense on the heat exchanger element 14 per time interval.
- the domestic dishwasher 1 has a heat storage medium 5.
- the heat storage medium 5 can bei- For example, be a coolant, in particular water, or include, which has a high specific heat capacity and / or a high enthalpy of fusion.
- the heat exchanger element 14 may have one or more heat exchanger sections 15, which protrude into the heat storage medium 5, so that heat can be transferred from the heat exchanger element 14 to the heat storage medium 5 particularly well.
- the heat exchanger element 14 can be kept at an approximately constant low temperature (the temperature should be at least lower than the temperature of the moist-warm process air emerging from the receiving space 2).
- the process air flowing out of the household dishwasher and dried after flowing through the heat exchanger 4 is symbolized by an arrow 23 in FIGS. 1, 2.
- the domestic dishwasher 1 has an air channel 8 through which the process air exiting from the receiving space 2 is conveyed to the heat exchanger element 14.
- Adjoining the air channel 8 is a flow channel 10 which leads the process air for dehumidification through the heat exchanger 4 and past the heat exchanger element 14.
- a fan 9 is arranged, which conveys the process air from the receiving space 2 to the heat exchanger 4 and therethrough.
- the fan 9 is arranged downstream of the heat exchanger 4 in the flow direction of the outflowing process air. This leads to the fact that the fan 9 already reaches dried air, so that little or no moisture condenses on the fan 9. As a result, the fan 9 is protected from damage.
- FIG. 2 shows a detail of FIG. 1, which shows the heat exchanger 4 and the heat pump arrangement 6.
- the hot-humid process air flowing out of the receiving space 2 is conducted to the heat exchanger 4.
- the heat exchanger 4 at least one heat exchanger element 14 is arranged, which is cooled by the heat transfer medium 5.
- the water vapor contained in the moist-warm process air condenses on the heat exchanger element 14, so that the process air is dried or water is withdrawn. By condensing the water vapor of the process air, this heat transfers to the heat exchanger element 14.
- the dried process air leaves the household dishwasher 1 finally through the air outlet 1 1 as exhaust air (see Figure 1).
- the heat exchanger element 14 preferably comprises heat exchanger sections 15 which extend into the heat storage medium 5. Through the heat exchanger sections 15, heat which is discharged from the passing air-water vapor mixture to the heat exchanger element 14 is transferred from the heat exchanger element 14 to the heat storage medium 5.
- the heat storage medium 5 can be, for example, water or a water-salt solution or comprise water or a water-salt solution.
- the heat storage medium 5 may be liquid during the process, or it may first be solid and melted by the heat absorption of the heat exchanger element 14. As a result, the heat storage medium 5 can absorb more heat than if it retains its state of aggregation despite heat absorption.
- the heat storage medium 5 preferably at least partially extends the evaporator 7, which is part of the heat pump assembly 6.
- a refrigerant is arranged, which can pass through the heat of the heat storage medium 5 in the gaseous state and thereby absorbs the heat.
- the refrigerant may then be passed to a compressor 17, which increases the pressure of the gaseous refrigerant, wherein the temperature of the refrigerant increases.
- a condenser 18 of the heat pump assembly 6 the heated refrigerant condenses and releases the heat to an environment of the condenser 18.
- the capacitor 18 is, for example, in the air inlet channel 13 is arranged. Through this fresh air can flow from the environment into the receiving space 2 of the washing container 21 of the household dishwasher 1 as a supply air.
- a heating element (not shown) may be arranged, which preheats the incoming fresh air.
- the heating element may comprise, for example, an electric heating coil.
- the heat released by the condenser 18 of the heat pump arrangement 6 can also be transferred to the rinsing liquor.
- the rinsing liquor to be heated is guided past or past the capacitor 18 by an additional channel (not shown here). Thereby, the power consumption of the household dishwasher 1 can be reduced.
- the refrigerant is passed to the condenser 18 to a throttle 16.
- the throttle 16 reduces the pressure of the refrigerant, whereby it cools. Thereafter, it returns to the evaporator 7, so that it can again absorb heat from the heat storage medium 5, in the process itself merges into the gaseous state and the cycle of the heat pump arrangement 6 is thus closed.
- the heat exchanger 4 in a dual function as a heat storage tank for removal of heat energy from the stored therein heat storage medium 5, in particular water, through the heat pump assembly 6 and at the same time as a removal tank or filling tank for supplying treatment liquid be formed in the receiving space 2 of the washing container of the household dishwasher.
- the heat storage medium 5, in particular storage water, from this heat exchanger 4 is thus at least partially used as a treatment liquid in the receiving space in the respective liquid-conducting partial program step of a washing program. Due to its dual function as a heat exchanger and filling tank, space in the dishwasher is advantageously saved, ie it is not necessary to have space for a separate tank with heat exchanger.
- the heat exchanger is formed by a container in the inlet side water, especially fresh water, as a heat storage medium and treatment liquid, via a supply, in particular from a water supply network, can be filled, and from the outlet side via a discharge water as Treatment liquid or process fluid in the receiving space of the washing container of the dishwasher can be fed.
- a feed line is shown in phantom and designated 19.
- a discharge line is shown in phantom and designated 20.
- the heat exchanger is therefore preferably operated here as an open tank with a water inlet and a water outlet.
- the heat storage medium in the tank or container of the heat exchanger is at least partially or completely changed, ie the container stored there heat storage medium partially or completely removed and filled with fresh heat storage medium, especially fresh water, so the risk of unwanted contamination the container of the heat exchanger largely avoided.
- this change of the heat storage medium can be beneficial for the thawing of any ice that has formed in the storage tank from the heat storage medium during the respective active phase of operation of the heat pump assembly where heat is removed from the heat storage medium. Because the temperature and thus the thermal energy content of the heat storage medium newly supplied to the storage tank, for example fresh water, is usually higher than the temperature and the thermal energy content of the heat storage medium frozen into ice in the storage tank.
- a partial area or the total area of a wall of the storage container forms or replaces a wall section of the air channel, so that the process air exiting from the receiving space directly, ie directly contacting, on a wall of the storage tank or storage container filled with the heat storage medium can pass by.
- the air duct is thermally coupled to the storage tank at least along a section of its course, effective heat transfer can be effected in a simple manner between the heat storage medium of the storage tank and the process air led out of the receiving space.
- the process air and the heat storage medium remain materially separated from each other.
- the heat exchanger is attached on the outside to a wall, in particular side wall, of the washing container of the domestic dishwasher, and in particular a thermal insulation layer or thermal barrier is provided between the heat exchanger and the wall of the washing compartment.
- a thermal insulation layer or thermal barrier is provided between the heat exchanger and the wall of the washing compartment.
- the storage container still serves as a thermal energy sink for heat loss, which escapes despite the thermal insulation layer from the washing.
- such a thermal insulation layer is not shown in FIGS. 1, 2.
- the exhaust air which flows out of the receiving space of the washing container out into the environment at the installation location of the dishwasher during the drying phase of the washing cycle of the respective dishwashing program is thus included before it leaves the dishwasher, ie before being dispensed to the surrounding area brought into thermal contact with the storage container and / or with the thermally coupled evaporator of the heat pump assembly and cooled that their temperature is lower than the temperature of the objects such as the adjacent kitchen furniture or the countertop in the vicinity of the dishwasher.
- the dew point temperature of the exhaust air is lowered to such an extent that is less than the temperature of the adjacent objects or materials in the vicinity of the dishwasher and / or less than the temperature of the ambient air.
- the moisture contained in the exhaust air flowing out of the receiving space is preferably condensed out on a cool surface of the storage tank and / or evaporator filled with the heat storage medium, which has been made cold by the preceding heat pump operation, before the exhaust air leaves the dishwasher. that little or no residual moisture, which is still contained in the thus dried exhaust air, can condense on objects in the vicinity of the dishwasher.
- the present invention is based in particular on the following: in open drying systems moist air is released to the environment. At the exit point, condensation may occur and cause damage to the surrounding components. By this invention, the formation of condensation should be avoided.
- a heat exchanger can preferably be integrated in a container filled with cold fluid.
- the container may expediently have an inlet air opening and an exhaust opening.
- the heat exchanger may preferably be positioned therebetween.
- the heat exchanger may in particular be designed so that ribs or the like. make it possible to remove the heat from the cold fluid.
- the fluid may preferably be removed by an evaporator of a heat pump, the heat during the drying process or in the previous heating phases.
- One possible embodiment is characterized in particular as follows: During the drying phase, a fan is put into operation in order to extract the moist process air from the dishwasher.
- the fan is preferably positioned after the heat exchanger.
- the process air is suitably cooled by the heat exchanger so that moisture condenses out and the air is brought to a higher relative humidity and a lower dew point. If the air is released to the environment ben, it has 100% relative humidity, but at a lower temperature level.
- the additional mixing effect with the ambient air avoids further condensation on surrounding components.
- the required cold can be provided by commissioning a heat pump.
- the resulting negative pressure in the dishwasher flows expediently at a Zu Kunststoffö Samuel fresh air.
- This fresh air can in turn preferably be preheated by a heat exchanger, which transfers the heat in particular from the condenser of the heat pump, in order to reduce the dew point and to dry the items to be washed efficiently.
- Another possible embodiment is analogous to the embodiment described above with the difference that the heat pump is not active during the drying process.
- the fluid in the container was cooled down in the preceding washing phases to keep the dew point of the exhaust air lower than the dew point of the environment.
- Another possible embodiment is analogous to the embodiment described above with the difference that instead of the coupled with the condenser of the heat pump assembly heat exchanger for the preheating of the incoming fresh air, a heating element is used.
- the invention leads in particular to the following advantages: no condensation problem on furniture or the environment,
Landscapes
- Washing And Drying Of Tableware (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016201688.1A DE102016201688A1 (de) | 2016-02-04 | 2016-02-04 | Haushaltsgeschirrspülmaschine sowie Verfahren zum Betreiben einer solchen |
| PCT/EP2017/051216 WO2017133907A1 (de) | 2016-02-04 | 2017-01-20 | Haushaltsgeschirrspülmaschine sowie verfahren zum betreiben einer solchen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3410914A1 true EP3410914A1 (de) | 2018-12-12 |
Family
ID=57851090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17700848.9A Withdrawn EP3410914A1 (de) | 2016-02-04 | 2017-01-20 | Haushaltsgeschirrspülmaschine sowie verfahren zum betreiben einer solchen |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3410914A1 (de) |
| DE (1) | DE102016201688A1 (de) |
| WO (1) | WO2017133907A1 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2702469A1 (es) * | 2017-09-01 | 2019-03-01 | Bsh Electrodomesticos Espana Sa | Maquina lavavajillas domestica con disposicion de bomba de calor |
| ES2702471A1 (es) * | 2017-09-01 | 2019-03-01 | Bsh Electrodomesticos Espana Sa | Maquina lavavajillas domestica con disposicion de bomba de calor |
| ES2702491A1 (es) * | 2017-09-01 | 2019-03-01 | Bsh Electrodomesticos Espana Sa | Máquina lavavajillas doméstica con disposición de tanque |
| US10945584B2 (en) * | 2018-07-30 | 2021-03-16 | Haier Us Appliance Solutions, Inc. | Drying assembly for a washing appliance |
| CN112890719B (zh) * | 2021-04-02 | 2022-03-15 | 珠海格力电器股份有限公司 | 洗碗机、洗碗机的烘干控制方法、装置及可读存储介质 |
| DE102022200715B4 (de) * | 2022-01-24 | 2024-07-25 | BSH Hausgeräte GmbH | Geschirrspülmaschine mit zumindest einer Trocknungseinrichtung |
| DE102024202682A1 (de) * | 2024-03-21 | 2025-09-25 | BSH Hausgeräte GmbH | Geschirrspülmaschine mit einer Wärmepumpe |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04187133A (ja) * | 1990-11-20 | 1992-07-03 | Matsushita Electric Ind Co Ltd | 食器洗浄機 |
| DE10041450A1 (de) * | 2000-08-23 | 2002-03-07 | Fritz Curtius | Einrichtung zur Trocknung von Geschirr |
| JP4396613B2 (ja) * | 2005-10-18 | 2010-01-13 | パナソニック株式会社 | 食器洗い乾燥機および厨房装置 |
| DE102010034715A1 (de) * | 2010-08-18 | 2012-02-23 | Etimex Technical Components Gmbh | Verfahren und Vorrichtung zum Trocknen von feuchter Luft |
| EP2574266B1 (de) * | 2010-12-29 | 2015-10-21 | Electrolux Home Products Corporation N.V. | Haushaltsgerät |
| EP2865313B1 (de) * | 2011-12-13 | 2023-01-25 | Ecolab USA Inc. | Geschirrspülmaschine |
| EP2662013A1 (de) * | 2012-05-07 | 2013-11-13 | ELECTROLUX PROFESSIONAL S.p.A. | Geschirrspüler mit Wärmepumpentrocknungsvorrichtung und zugehöriges Verfahren |
| EP2749682B1 (de) * | 2012-12-27 | 2015-08-05 | Electrolux Home Products Corporation N.V. | Wäschetrockner |
| DE102013019185A1 (de) * | 2013-11-18 | 2015-05-21 | Stiebel Eltron Gmbh & Co. Kg | Geschirrspülmaschine mit einem Spülflüssigkeitskreislauf |
| AU2013407867B2 (en) * | 2013-12-19 | 2019-04-11 | Electrolux Appliances Aktiebolag | Dishwasher comprising heat pump system |
| WO2015090409A1 (en) * | 2013-12-19 | 2015-06-25 | Electrolux Appliances Aktiebolag | Dishwasher comprising heat pump system |
| US8973286B1 (en) * | 2014-01-27 | 2015-03-10 | Elwha Llc | Vacuum assisted dryer systems and methods |
-
2016
- 2016-02-04 DE DE102016201688.1A patent/DE102016201688A1/de active Pending
-
2017
- 2017-01-20 WO PCT/EP2017/051216 patent/WO2017133907A1/de not_active Ceased
- 2017-01-20 EP EP17700848.9A patent/EP3410914A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017133907A1 (de) | 2017-08-10 |
| DE102016201688A1 (de) | 2017-08-10 |
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